After Sobig.f and Mydoom.a, I thought the situation would only get worse. But now its the end of October and we havent seen a serious email worm outbreak for months. Virus writers have been arrested worldwide, and there has been lots of media coverage. The computer underground sees that cyber criminals are going to be caught, no matter where they hide. Maybe users are beginning to be less careless about opening emails and clicking on attachments and/or enclosed links.”]
Source: https://securelist.com/the-end-of-the-age-of-worms/29862/